<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <h1>首页</h1>
    <a href="/userList">用户列表</a><br>
    <% if(username){ %>
    <span><%=username%></span>
    <a href="/center">个人中心</a>
    <a href="/logout">退出登录</a>
    <% }else{ %>
    <a href="/login">登录</a>
    <a href="/add">注册</a>
    <%}%>
  </body>
</html>
